Food can be classified in accordance to their chemical property, to their function, to their essentiality, to their concentration and to their nutritive value.
a) According to the chemical nature
• Carbohydrates
• Vitamins
• Proteins
• Dietary fiber
• Fats
• Water minerals
b) According to their function in the body
Energy giving foods
The carbohydrates, fats and the protein are considered as calorie nutrients, so that the body can perform the necessary functions. Rice, chapatti, bread, potato, sugar, oil, butter and ghee are examples of energy giving foods.
Body building foods
Foods such as proteins, fats and carbohydrates are also called as body-building food. They are the nutrients that form body tissues. Fish, meat, chicken, eggs, pulses, nuts and milk are some body building foods.
Protective foods
Vitamins and minerals are the nutrients that function to regulate body processes. They protect us from various diseases. Fruits and vegetables are some examples. Therefore we must eat these regularly.
c) According to chemical properties
Organic: Nutrients that contain the element of carbon are called as organic nutrients.
Inorganic: Nutrients that do not contain carbon element are called as inorganic nutrients.
The organic nutrients include carbohydrates, lipids, proteins and vitamins. Water and minerals are inorganic.
d) According to its mass depending on the quantity necessary for cells and organisms are classified as
Macronutrients: Macronutrients are required in large quantities daily. Proteins, carbohydrates and fats are macronutrients. They are the basis of any diet.
Micronutrients: Micronutrients are needed in small quantities (usually in amounts less than milligrams). These nutrients are involved in regulating metabolism and energy processes. They are vitamins and minerals.
e) According to its origin
Depending upon the origin of food it has been classified as animal food sources and plant food sources.
f) According to its nutritive value
Cereals and millets
Pulses
Nuts and oil seeds
Vegetables
Green leafy vegetables
Non-leafy vegetables
Roots and tubers
Fruits
Milk and milk products
Animal foods—meat, fish, liver, egg etc.
Carbohydrate foods
Condiments and spice
Beverage is derived from the Latin word 'Bever' which meant rest or repose from work. Beverage can be defined as any type of intoxicating or non - intoxicating drinks which is hygienically consumed by human, either to quench thirst or for enjoyment, refreshments, relaxation or nourishment.
Beverage constitutes significant amount of revenue in a hotel as during Breakfast nourishing drinks like milk, fruit juices and malted drinks like Horlicks, hot chocolate are served. At lunch cold beverage, juice, fermented drinks are served and at dinner time alcoholic beverages are consumed for relaxation and refreshment. Beverage includes drink ranging from milk, juice to spirits, beer, liqueurs.
1. Alcoholic beverage
2. Non-Alcoholic beverage
Beverage are classified as Alcoholic and non - alcoholic. Alcoholic beverages are further classified into three types: - fermented, distilled and Compound. Wine, beer, cider, Perry, feny are fermented beverage while Brandy, whisky, rum, gin, vodka, tequila is distilled alcoholic beverages. Similarly compound alcoholic beverages consists of liqueur, cordials, Bitters.
Non - alcoholic beverages are divided as refreshing, Nourishing and stimulating. Refreshing. Nourishing beverage are further divided into Aerated and non-Aerated. Coke, sprite, lemonade, soda water and tonic water while non aerated beverages consist of spring water, syrups, cordials, squash. Nourishing drinks consists of juice, milk, milk base liquid and stimulating drink consists of tea /coffee.